EP3102924A1 - Calibration for gas detection - Google Patents
Calibration for gas detectionInfo
- Publication number
- EP3102924A1 EP3102924A1 EP15705172.3A EP15705172A EP3102924A1 EP 3102924 A1 EP3102924 A1 EP 3102924A1 EP 15705172 A EP15705172 A EP 15705172A EP 3102924 A1 EP3102924 A1 EP 3102924A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- detector
- gas
- concentrations
- over
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title description 8
- 238000002835 absorbance Methods 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 26
- 238000012937 correction Methods 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 58
- 230000008859 change Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000013102 re-test Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
- G01N21/274—Calibration, base line adjustment, drift correction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/0332—Cuvette constructions with temperature control
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/12—Circuits of general importance; Signal processing
- G01N2201/127—Calibration; base line adjustment; drift compensation
- G01N2201/12746—Calibration values determination
- G01N2201/12753—Calibration values determination and storage
Definitions
- a method 10 for populating gas correction tables is shown.
- a temperature chamber is manually controlled to simulate many different ambient temperatures.
- a designer or operator mixes many different gas concentrations.
- a gas detection surface of the detector is populated manually for gas absorption at each temperature of block 12.
- the detector's firmware is modified to feed the absorption values back into the detector or to change a formula to ensure that a correct gas concentration is calculated at each temperature.
- the method 10 typically takes weeks to complete and may have to be repeated multiple times in order to gain confidence in the accuracy of the results.
- detectors are typically limited to pre-defined gas types or ranges. Each time the designer wants to add a new gas type, or modify properties or parameters associated with a gas currently being monitored by a detector, the detector's firmware needs to be updated.
- An embodiment is directed to a method comprising: controlling a flow of a mixture of gas in a chamber at a plurality of concentrations, controlling a temperature of the chamber over a temperature range, reading, by a computing device comprising a processor, gas absorbance values from a first detector included in the chamber over the plurality of concentrations and over the temperature range, generating at least one of a look-up table and a mathematical formula for the first detector based on the gas absorbance values, and causing the at least one of the look-up table and the mathematical formula to be stored in a second detector.
- An embodiment is directed to an apparatus comprising: at least one processor, and memory having instructions stored thereon that, when executed by the at least one processor, cause the apparatus to: control a flow of a mixture of gas at a plurality of concentrations, control a temperature of a chamber over a temperature range, read gas absorbance values from a first detector included in the chamber over the plurality of concentrations and over the temperature range, and generate at least one of a look-up table and a mathematical formula based on the gas absorbance values.
- An embodiment is directed to a system comprising: a chamber configured to be operated at a plurality of temperatures over a temperature range, a mass flow device configured to supply a mixture of gas to the chamber at a plurality of concentrations, a detector device configured to detect a concentration of the gas in the chamber, and a computing device configured to: read gas absorbance values from the detector device corresponding to applications of the gas in the chamber at the plurality of concentrations over the temperature range, and generate at least one of a look-up table and a mathematical formula as a file configured to be downloaded to an instance of the detector based on the gas absorbance values.
- FIG. 1 A is a flow chart of a method in accordance with the prior art
- FIG. IB is a schematic block diagram illustrating an exemplary computing system
- FIG. 1C is a block diagram of an exemplary system environment
- FIG. 2 illustrates a flow chart of an exemplary method.
- Exemplary embodiments of apparatuses, systems, and methods are described for automatically generating and programming a calibration surface (e.g., a standard calibration surface) of a detector (e.g., an optical gas detector).
- automated processes may be used to collect data.
- An algorithm may be included in a detector. The algorithm, when executed, may enable the detector to learn the characteristics of any gas (e.g., hydrocarbon combustible gas, toxic gas, etc.), linearize the detector's response to that gas, and provide an accurate, open path gas detection output for the gas, potentially without requiring the detector to be re-certified or the detector's firmware to be modified.
- any gas e.g., hydrocarbon combustible gas, toxic gas, etc.
- Computing system 100 may be part of a detector.
- at least a portion of the system 100 may be associated with firmware of the detector.
- the system 100 is shown as including a memory 102.
- the memory 102 may store executable instructions.
- the executable instructions may be stored or organized in any manner and at any level of abstraction, such as in connection with one or more applications, processes, routines, procedures, methods, etc. As an example, at least a portion of the instructions are shown in FIG. IB as being associated with a first program 104a and a second program 104b.
- the instructions stored in the memory 102 may be executed by one or more processors, such as a processor 106.
- the processor 106 may be coupled to one or more input/output (I/O) devices 108.
- the I/O device(s) 108 may include one or more of a keyboard or keypad, a touchscreen or touch panel, a display screen, a microphone, a speaker, a mouse, a button, a remote control, a control stick, a joystick, a printer, a telephone or mobile device (e.g., a smartphone), a sensor, etc.
- the I/O device(s) 108 may be configured to provide an interface to allow a user to interact with the system 100.
- the processor 106 may be coupled to a number 'n' of databases, 110-1, 110-2, ... 110-n.
- the databases 110 may be used to store data, such as data obtained from one or more sensors.
- the data may pertain to one or more parameters associated with gas detection.
- the system 150 may be associated with a test-bed or test equipment that may be used to populate or select values for a look-up table used in gas detection.
- the system 150 may include a chamber 152.
- the chamber 152 may be a closed or partially closed structure.
- the chamber 152 may be used to control an environment in which a detector 154 is placed.
- the detector 154 may represent an instance of a particular make and/or model of detector. The results of a test performed on the detector 154 may be applied to the detector 154 or other detectors (e.g., other instances of the detector 154).
- the chamber 152 may include a gas tube 155.
- the gas tube 155 may be configured to be filled with one or more gases, potentially at one or more concentrations.
- the gas tube 155 may be coupled to a mass flow device 156.
- the mass flow device 156 may mix one or more gases, at potentially one or more concentrations.
- the mass flow device 156 may be controlled by, or operative in response to commands provided by, a computing device or controller 158.
- the controller 158 may control the temperature of the chamber 152.
- the controller 158 may cause the temperature of the chamber 152 to sequence over a range of temperatures, potentially in discrete steps.
- the controller 158 may cause the mass flow device 156 to provide a sequence of concentrations of a gas over a range of concentrations to the gas tube 155.
- the controller 158 may read from the detector 154 an absorbance value coinciding with the gas concentration dictated by the mass flow device 156.
- a look-up table or a mathematical formula may be generated by the controller 158 mapping the absorbance value to the gas concentration.
- One or more correction factors may be applied to account for any differences between the actual gas concentration output by the mass flow device 156/gas tube 155 and the gas concentration detected by the detector 154.
- Interpolation techniques e.g., linearization techniques
- the systems 100 and 150 are illustrative. In some embodiments, one or more of the entities may be optional. In some embodiments, additional entities not shown may be included. In some embodiments, the entities may be arranged or organized in a manner different from what is shown in FIGS. 1B-1C. For example, in some embodiments, the memory 102 may be coupled to or combined with one or more of the databases 110.
- Embodiments of the disclosure may be used to automate data collection.
- the data may be used to populate a calibration curve, surface, or look-up table.
- Parameters for gases may be added or modified.
- the parameters may be based on optical gas detection technology.
- firmware associated with a detector might not need to be modified for every type of gas, thereby removing the need to re-approve, re-certify, or re-test the firmware.
- the method 200 may be at least partially executed by one or more systems, components, or devices, such as those described herein (e.g., the system 100).
- the method 300 may be used to populate a look-up table used in detecting gas.
- firmware for a detector may be designed.
- the firmware may be designed to maintain a surface of gas absorbance values for an entire temperature range, potentially subject to modification using a communication interface.
- an algorithm may be generated.
- the algorithm may be configured to perform one or more tasks, such as those described below in connection with block 206- 216.
- a temperature of a chamber may be controlled.
- the temperature of the chamber may be set at a particular value.
- a mass flow device may be controlled.
- the mass flow device may mix a known or predetermined amount or concentration of gas or gases.
- the mass flow device may provide for a flow of a single gas at a time, potentially at a plurality of concentrations.
- an absorbance value may be read from the detector.
- the reading performed in block 210 may be performed for each gas concentration and temperature.
- one or more look-up tables may be generated. Additionally, or alternatively, one or more mathematical formulas for computing a gas concentration may be generated or modified. The look-up table and/or mathematical formulas may be organized as part of one or more files.
- the table(s) and/or formula(s) of block 212 may be stored in the detector.
- the table(s) and/or formula(s) may be downloaded to the detector for purposes of storing the same.
- the storage operation of block 214 may be performed by a manufacturer of the detector.
- another party e.g., a retailer or wholesaler, an end user or consumer, etc.
- a manufacturer or supplier of the detector may provide a file that includes the table(s) and/or formula(s) for another party to download to the detector.
- the detector may calculate a gas concentration using one or more values from the look-up table(s) or one or more mathematical formulas.
- the detector may output the calculated gas concentration in one or more forms.
- the output may include a warning indication if the detected gas concentration exceeds a threshold. In this manner, the detector may be used to warn of a hazardous gas condition.
- the method 200 is illustrative. In some embodiments, one or more of the blocks or operations (or a portion thereof) may be optional. In some embodiments, one or more additional blocks or operations not shown may be included. In some embodiments, the blocks or operations may execute in an order or sequence that is different from what is shown in FIG. 2.
- Embodiments of the disclosure may be used to automate the population of a lookup table or formula used in gas detection, thereby saving time and labor.
- a look-up table or formula file may be generated to incorporate the change/update.
- the look-up table or formula file may subsequently be downloaded to the detector to facilitate the change/update.
- the look-up table or formula may be used to supplement, and not replace, firmware associated with an instance of a detector.
- various functions or acts may take place at a given location and/or in connection with the operation of one or more apparatuses, systems, or devices. For example, in some embodiments, a portion of a given function or act may be performed at a first device or location, and the remainder of the function or act may be performed at one or more additional devices or locations.
- an apparatus or system may include one or more processors, and memory storing instructions that, when executed by the one or more processors, cause the apparatus or system to perform one or more methodological acts as described herein.
- Various mechanical components known to those of skill in the art may be used in some embodiments.
- Embodiments may be implemented as one or more apparatuses, systems, and/or methods.
- instructions may be stored on one or more computer- readable media, such as a transitory and/or non-transitory computer-readable medium.
- the instructions when executed, may cause an entity (e.g., an apparatus or system) to perform one or more methodological acts as described herein.
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Engineering & Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201461937067P | 2014-02-07 | 2014-02-07 | |
PCT/US2015/014353 WO2015119985A1 (en) | 2014-02-07 | 2015-02-04 | Calibration for gas detection |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3102924A1 true EP3102924A1 (en) | 2016-12-14 |
EP3102924B1 EP3102924B1 (en) | 2023-06-07 |
Family
ID=52478107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15705172.3A Active EP3102924B1 (en) | 2014-02-07 | 2015-02-04 | Calibration for gas detection |
Country Status (4)
Country | Link |
---|---|
US (1) | US10302609B2 (en) |
EP (1) | EP3102924B1 (en) |
ES (1) | ES2948795T3 (en) |
WO (1) | WO2015119985A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101797637B1 (en) * | 2016-03-28 | 2017-11-20 | 주식회사아이센랩 | Calibration device and apparatus for analysing gas component having the same |
Family Cites Families (25)
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US5060505A (en) | 1989-09-12 | 1991-10-29 | Sensors, Inc. | Non-dispersive infrared gas analyzer system |
US5510269A (en) | 1992-11-20 | 1996-04-23 | Sensors, Inc. | Infrared method and apparatus for measuring gas concentration including electronic calibration |
CA2134599A1 (en) | 1994-10-28 | 1996-04-29 | Patrick Hung | Method and apparatus for calibrating a gas detector sensor |
US5892229A (en) | 1996-04-22 | 1999-04-06 | Rosemount Analytical Inc. | Method and apparatus for measuring vaporous hydrogen peroxide |
US5822058A (en) | 1997-01-21 | 1998-10-13 | Spectral Sciences, Inc. | Systems and methods for optically measuring properties of hydrocarbon fuel gases |
US6098013A (en) | 1998-05-11 | 2000-08-01 | Caterpillar Inc. | System and method for monitoring exhaust gas hydrocarbon content in internal combustion engines |
US6640626B2 (en) | 2002-01-18 | 2003-11-04 | Hitachi, Ltd. | Method and system for identifying a type of gas |
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US7244939B2 (en) | 2003-12-09 | 2007-07-17 | Dynament Limited | Gas sensor |
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US7640782B2 (en) * | 2007-04-27 | 2010-01-05 | American Sterilizer Company | Vaporized hydrogen peroxide probe calibration rig |
EP2142909B1 (en) | 2007-05-02 | 2015-08-26 | Siemens Aktiengesellschaft | Detector arrangement for a nondispersive infrared gas analyser and method for the detection of a measuring gas component in a gas mixture by means of such a gas analyser |
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DE102009015121B4 (en) | 2009-03-31 | 2012-10-31 | Siemens Aktiengesellschaft | Selective carbon monoxide detector and method of operation of the detector |
WO2012033853A1 (en) | 2010-09-07 | 2012-03-15 | Nextteq Llc | System for visual and electronic reading of colorimetric tubes |
JP5888747B2 (en) | 2010-09-09 | 2016-03-22 | 学校法人東北学院 | Specific gas concentration sensor |
US20120078532A1 (en) * | 2010-09-24 | 2012-03-29 | David Edward Forsyth | Non-dispersive infrared sensor measurement system and method |
GB201018418D0 (en) | 2010-11-01 | 2010-12-15 | Gas Sensing Solutions Ltd | Temperature calibration methods and apparatus for optical absorption gas sensors, and optical absorption gas sensors thereby calibrated |
US8942944B2 (en) | 2011-09-13 | 2015-01-27 | Laguna Research, Inc. | System and method for dynamically measuring oxygen levels |
US9276305B2 (en) | 2012-05-02 | 2016-03-01 | The United States Of America As Represented By The Secretary Of The Army | Method and apparatus for providing a multifunction sensor using mesh nanotube material |
DE102012215594B3 (en) | 2012-09-03 | 2013-08-01 | Sick Ag | Method for laser spectroscopy of gases |
US9291608B2 (en) * | 2013-03-13 | 2016-03-22 | Aclima Inc. | Calibration method for distributed sensor system |
-
2015
- 2015-02-04 US US15/116,436 patent/US10302609B2/en active Active
- 2015-02-04 WO PCT/US2015/014353 patent/WO2015119985A1/en active Application Filing
- 2015-02-04 EP EP15705172.3A patent/EP3102924B1/en active Active
- 2015-02-04 ES ES15705172T patent/ES2948795T3/en active Active
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2015119985A1 * |
Also Published As
Publication number | Publication date |
---|---|
US10302609B2 (en) | 2019-05-28 |
WO2015119985A1 (en) | 2015-08-13 |
ES2948795T3 (en) | 2023-09-19 |
EP3102924B1 (en) | 2023-06-07 |
US20160349226A1 (en) | 2016-12-01 |
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